kernel.git/drivers/hv/hv.c, branch linux-3.2.y

x86/retpoline/hyperv: Convert assembler indirect jumps

2018-03-19T18:58:32Z

commit e70e5892b28c18f517f29ab6e83bd57705104b31 upstream. Convert all indirect jumps in hyperv inline asm code to use non-speculative sequences when CONFIG_RETPOLINE is enabled. Signed-off-by: David Woodhouse Signed-off-by: Thomas Gleixner Acked-by: Arjan van de Ven Acked-by: Ingo Molnar Cc: gnomes@lxorguk.ukuu.org.uk Cc: Rik van Riel Cc: Andi Kleen Cc: Josh Poimboeuf Cc: thomas.lendacky@amd.com Cc: Peter Zijlstra Cc: Linus Torvalds Cc: Jiri Kosina Cc: Andy Lutomirski Cc: Dave Hansen Cc: Kees Cook Cc: Tim Chen Cc: Greg Kroah-Hartman Cc: Paul Turner Link: https://lkml.kernel.org/r/1515707194-20531-9-git-send-email-dwmw@amazon.co.uk [bwh: Backported to 3.2: - Drop changes to hv_do_fast_hypercall8() - Include earlier updates to the asm constraints - Adjust filename, context] Signed-off-by: Ben Hutchings

drivers: hv: Turn off write permission on the hypercall page

2017-06-05T20:13:48Z

commit 372b1e91343e657a7cc5e2e2bcecd5140ac28119 upstream. The hypercall page only needs to be executable but currently it is setup to be writable as well. Fix the issue. Signed-off-by: K. Y. Srinivasan Acked-by: Kees Cook Reported-by: Stephen Hemminger Tested-by: Stephen Hemminger Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.2: adjust filename, context] Signed-off-by: Ben Hutchings

Drivers: hv: vmbus: Cleanup hv_post_message()

2014-12-14T16:23:44Z

commit b29ef3546aecb253a5552b198cef23750d56e1e4 upstream. Minimize failures in this function by pre-allocating the buffer for posting messages. The hypercall for posting the message can fail for a number of reasons: 1. Transient resource related issues 2. Buffer alignment 3. Buffer cannot span a page boundry We address issues 2 and 3 by preallocating a per-cpu page for the buffer. Transient resource related failures are handled by retrying by the callers of this function. This patch is based on the investigation done by Dexuan Cui . I would like to thank Sitsofe Wheeler for reporting the issue and helping in debuggging. Signed-off-by: K. Y. Srinivasan Reported-by: Sitsofe Wheeler Tested-by: Sitsofe Wheeler Signed-off-by: Greg Kroah-Hartman [bwh: Backported to 3.2: - s/NR_CPUS/MAX_NUM_CPUS/ - Adjust context, indentation - Also free the page in hv_synic_init() error path] Signed-off-by: Ben Hutchings

Staging: hv: remove unneeded asm include file in hyperv.h

2011-10-11T14:49:19Z

No one outside of the hyperv core needs to include the asm/hyperv.h file, so don't put it in the "global" include/linux/hyperv.h file. Cc: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman

Staging: hv: move hyperv code out of staging directory

2011-10-11T04:52:55Z

After many years wandering the desert, it is finally time for the Microsoft HyperV code to move out of the staging directory. Or at least the core hyperv bus code, and the utility driver, the rest still have some review to get through by the various subsystem maintainers. Signed-off-by: Greg Kroah-Hartman Signed-off-by: K. Y. Srinivasan